i have a 94 z-28. I have 130k on the car now...so i figured a rebuild is in the near future and i want to do some performance upgrades. i was wondering how the LT4 Hotcam and the LT4 aluminum heads are from a performance stand point. i want my car to remain very reliable but i want some speed and that nice rumble also. i mean i know i could get alot of hp out of some AFR heads and stuff but i do need reliablility. thank you for your help and if anyone knows any good rebuild kits for the LT1 please let me know or anything else for that matter thanks again